Radiation Cross-linked Polyethylene Heat Shrinkable Tape (Lap Joint)

Installation Guide & Precautions

Important: These instructions apply to both the roll and sheet formats of the Heat Shrinkable Tape (Lap Joint).

Quick Installation Steps

1. Surface preparation: Clean and blast the weld area to Sa2.5级. Grind smooth any weld irregularities.
2. Pipe preheating: Preheat the pipe around the weld to the temperature recommended by the primer manufacturer (typically 75°C-85°C).
3. Primer application: Apply solvent-free epoxy primer to the prepared area.
4. Position the tape:
   • For rolls: Wrap the tape around the pipe, ensuring a minimum 100mm circumferential overlap.
   • For sheets: Position the sheet over the weld area with the required longitudinal overlap.
5. Install fixing strip: Secure the overlap seam with the provided fixing strip.
6. Heat shrinking: Using a propane torch, heat the tape evenly from the center outward. Shrink until the adhesive flows out slightly at both ends.
7. Final inspection: Check for smooth coverage, no bubbles, and full adhesion at the overlaps and pipe ends.

Key Reminders

• Do not overheat – Excessive heat can burn the backing. Keep the torch moving.
• Shrink from the center – This prevents air entrapment.
• Check overlap – A minimum 100mm overlap is critical.
• Storage: Keep in original packaging in a dry area below 35°C, away from sunlight.